jspinlock.cpp
2.24 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
/***************************************************************************
* Copyright (C) 2005 by Jeff Ferr *
* root@sat *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "Stdafx.h"
#include "jspinlock.h"
namespace jthread {
SpinLock::SpinLock():
jcommon::Object()
{
jcommon::Object::SetClassName("jthread::SpinLock");
#ifdef _WIN32
_lock.lock = 1;
#else
pthread_spin_init(&_lock.lock, 0);
#endif
}
SpinLock::~SpinLock()
{
#ifdef _WIN32
#else
pthread_spin_destroy(&_lock.lock);
#endif
}
void SpinLock::Lock()
{
#ifdef _WIN32
int a = 1;
do {
int k = a;
a = _lock.lock;
_lock.lock = k;
} while(a != 0);
#else
pthread_spin_lock(&_lock.lock);
#endif
}
void SpinLock::Unlock()
{
#ifdef _WIN32
_lock.lock = 0;
#else
pthread_spin_unlock(&_lock.lock);
#endif
}
bool SpinLock::TryLock()
{
#ifdef _WIN32
return (_lock.lock == 0);
#else
return pthread_spin_trylock(&_lock.lock);
#endif
}
}